Method and device for reevaluating and preempting mode2 resource during sl drx operation in nr v2x

ABSTRACT

Proposed is an operation method of a first device ( 100 ) in a wireless communication system. The method may comprise the steps of: starting a first timer related to an on-duration time; starting a second timer; and performing SL communication during an active time.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is the National Stage filing under 35 U.S.C. 371 ofInternational Application No. PCT/KR2021/014738, filed on Oct. 20, 2021,which claims the benefit of U.S. Provisional Application No. 63/094,297,filed on Oct. 20, 2020, the contents of which are all herebyincorporated by reference herein in their entireties.

TECHNICAL FIELD

This disclosure relates to a wireless communication system.

BACKGROUND

Sidelink (SL) communication is a communication scheme in which a directlink is established between User Equipments (UEs) and the UEs exchangevoice and data directly with each other without intervention of anevolved Node B (eNB). SL communication is under consideration as asolution to the overhead of an eNB caused by rapidly increasing datatraffic. Vehicle-to-everything (V2X) refers to a communicationtechnology through which a vehicle exchanges information with anothervehicle, a pedestrian, an object having an infrastructure (or infra)established therein, and so on. The V2X may be divided into 4 types,such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I),vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). The V2Xcommunication may be provided via a PC5 interface and/or Uu interface.

Meanwhile, as a wider range of communication devices require largercommunication capacities, the need for mobile broadband communicationthat is more enhanced than the existing Radio Access Technology (RAT) isrising. Accordingly, discussions are made on services and user equipment(UE) that are sensitive to reliability and latency. And, a nextgeneration radio access technology that is based on the enhanced mobilebroadband communication, massive Machine Type Communication (MTC),Ultra-Reliable and Low Latency Communication (URLLC), and so on, may bereferred to as a new radio access technology (RAT) or new radio (NR).Herein, the NR may also support vehicle-to-everything (V2X)communication.

SUMMARY

In one embodiment, a method of operating the first device 100 in awireless communication system is proposed. The method may includestarting a first timer related to an on-duration time; starting a secondtimer; and performing SL communication within an active time.

The user equipment (UE) may efficiently perform SL communication.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a structure of an NR system, based on an embodiment of thepresent disclosure.

FIG. 2 shows a radio protocol architecture, based on an embodiment ofthe present disclosure.

FIG. 3 shows a structure of a radio frame of an NR, based on anembodiment of the present disclosure.

FIG. 4 shows a structure of a slot of an NR frame, based on anembodiment of the present disclosure.

FIG. 5 shows an example of a BWP, based on an embodiment of the presentdisclosure.

FIG. 6 shows a procedure of performing V2X or SL communication by a UEbased on a transmission mode, based on an embodiment of the presentdisclosure.

FIG. 7 shows three cast types, based on an embodiment of the presentdisclosure.

FIG. 8 shows an example of a DRX period according to an embodiment ofthe present disclosure.

FIG. 9 shows an example in which an active time is extended by a timeoffset according to an embodiment of the present disclosure.

FIG. 10 shows a procedure in which a first device determines whether ornot to pre-empt an SL resource according to an embodiment of the presentdisclosure.

FIG. 11 shows an example of a priority value related to a pre-emptionaccording to an embodiment of the present disclosure.

FIG. 12 shows a procedure for a first device to perform wirelesscommunication based on a sidelink (SL) discontinuous reception (DRX)configuration according to an embodiment of the present disclosure.

FIG. 13 shows a procedure for a second device to perform wirelesscommunication according to an embodiment of the present disclosure.

FIG. 14 shows a communication system 1, based on an embodiment of thepresent disclosure.

FIG. 15 shows wireless devices, based on an embodiment of the presentdisclosure.

FIG. 16 shows a signal process circuit for a transmission signal, basedon an embodiment of the present disclosure.

FIG. 17 shows another example of a wireless device, based on anembodiment of the present disclosure.

FIG. 18 shows a hand-held device, based on an embodiment of the presentdisclosure.

FIG. 19 shows a vehicle or an autonomous vehicle, based on an embodimentof the present disclosure.

DETAILED DESCRIPTION

In the present disclosure, “A or B” may mean “only A”, “only B” or “bothA and B.” In other words, in the present disclosure, “A or B” may beinterpreted as “A and/or B”. For example, in the present disclosure, “A,B, or C” may mean “only A”, “only B”, “only C”, or “any combination ofA, B, C”.

A slash (/) or comma used in the present disclosure may mean “and/or”.For example, “A/B” may mean “A and/or B”. Accordingly, “A/B” may mean“only A”, “only B”, or “both A and B”. For example, “A, B, C” may mean“A, B, or C”.

In the present disclosure, “at least one of A and B” may mean “only A”,“only B”, or “both A and B”. In addition, in the present disclosure, theexpression “at least one of A or B” or “at least one of A and/or B” maybe interpreted as “at least one of A and B”.

In addition, in the present disclosure, “at least one of A, B, and C”may mean “only A”, “only B”, “only C”, or “any combination of A, B, andC”. In addition, “at least one of A, B, or C” or “at least one of A, B,and/or C” may mean “at least one of A, B, and C”.

In addition, a parenthesis used in the present disclosure may mean “forexample”. Specifically, when indicated as “control information (PDCCH)”,it may mean that “PDCCH” is proposed as an example of the “controlinformation”. In other words, the “control information” of the presentdisclosure is not limited to “PDCCH”, and “PDCCH” may be proposed as anexample of the “control information”. In addition, when indicated as“control information (i.e., PDCCH)”, it may also mean that “PDCCH” isproposed as an example of the “control information”.

In the following description, ‘when, if, or in case of’ may be replacedwith ‘based on’.

A technical feature described individually in one figure in the presentdisclosure may be individually implemented, or may be simultaneouslyimplemented.

In the present disclosure, a higher layer parameter may be a parameterwhich is configured, pre-configured or pre-defined for a UE. Forexample, a base station or a network may transmit the higher layerparameter to the UE. For example, the higher layer parameter may betransmitted through radio resource control (RRC) signaling or mediumaccess control (MAC) signaling.

The technology described below may be used in various wirelesscommunication systems such as code division multiple access (CDMA),frequency division multiple access (FDMA), time division multiple access(TDMA), orthogonal frequency division multiple access (OFDMA), singlecarrier frequency division multiple access (SC-FDMA), and so on. TheCDMA may be implemented with a radio technology, such as universalterrestrial radio access (UTRA) or CDMA-2000. The TDMA may beimplemented with a radio technology, such as global system for mobilecommunications (GSM)/general packet ratio service (GPRS)/enhanced datarate for GSM evolution (EDGE). The OFDMA may be implemented with a radiotechnology, such as institute of electrical and electronics engineers(IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, evolved UTRA(E-UTRA), and so on. IEEE 802.16m is an evolved version of IEEE 802.16eand provides backward compatibility with a system based on the IEEE802.16e. The UTRA is part of a universal mobile telecommunication system(UMTS). 3rd generation partnership project (3GPP) long term evolution(LTE) is part of an evolved UMTS (E-UMTS) using the E-UTRA. The 3GPP LTEuses the OFDMA in a downlink and uses the SC-FDMA in an uplink.LTE-advanced (LTE-A) is an evolution of the LTE.

5G NR is a successive technology of LTE-A corresponding to a newClean-slate type mobile communication system having the characteristicsof high performance, low latency, high availability, and so on. 5G NRmay use resources of all spectrum available for usage including lowfrequency bands of less than 1 GHz, middle frequency bands ranging from1 GHz to 10 GHz, high frequency (millimeter waves) of 24 GHz or more,and so on.

For clarity in the description, the following description will mostlyfocus on LTE-A or NR. However, technical features according to anembodiment of the present disclosure will not be limited only to this.

For terms and techniques not specifically described among terms andtechniques used in this specification, a wireless communication standarddocument published before the present specification is filed may bereferred to. For example, documents of Table 1 below may be referred to.

TABLE 1 3GPP LTE 3GPP NR (e.g. 5G) 3GPP TS 36.211: Physical channels and3GPP TS 38 211: Physical channels and modulation modulation 3GPP TS36.212: Multiplexing and channel 3GPP TS 38.212: Multiplexing andchannel coding coding 3GPP TS 36.213: Physical layer procedures 3GPP TS38.213: Physical layer procedures 3GPP TS 36.214: Physical layer; forcontrol Measurements 3GPP TS 38.214: Physical layer procedures 3GPP TS36.300: Overall description for data 3GPP TS 36.304: User Equipment (UE)3GPP TS 38.215: Physical layer procedures in idle mode measurements 3GPPTS 36.314: Layer 2 - Measurements 3GPP TS 38.300: Overall description3GPP TS 36.321: Medium Access Control 3GPP TS 38.304: User Equipment(UE) (MAC) protocol procedures in idle mode and in RRC inactive 3GPP TS36.322: Radio Link Control (RLC) state protocol 3GPP TS 38.321: MediumAccess Control 3GPP TS 36.323: Packet Data Convergence (MAC) protocolProtocol (PDCP) 3GPP TS 38.322: Radio Link Control (RLC) 3GPP TS 36.331:Radio Resource Control protocol (RRC) protocol 3GPP TS 38.323: PacketData Convergence Protocol (PDCP) 3GPP TS 38 331: Radio Resource Control(RRC) protocol 3GPP TS 37.324: Service Data Adaptation Protocol (SDAP)3GPP TS 37.340: Multi-connectivity; Overall description

FIG. 1 shows a structure of an NR system, based on an embodiment of thepresent disclosure. The embodiment of FIG. 1 may be combined withvarious embodiments of the present disclosure.

Referring to FIG. 1 , a next generation-radio access network (NG-RAN)may include a BS 20 providing a UE 10 with a user plane and controlplane protocol termination. For example, the BS 20 may include a nextgeneration-Node B (gNB) and/or an evolved-NodeB (eNB). For example, theUE 10 may be fixed or mobile and may be referred to as other terms, suchas a mobile station (MS), a user terminal (UT), a subscriber station(SS), a mobile terminal (MT), wireless device, and so on. For example,the BS may be referred to as a fixed station which communicates with theUE 10 and may be referred to as other terms, such as a base transceiversystem (BTS), an access point (AP), and so on.

The embodiment of FIG. 1 exemplifies a case where only the gNB isincluded. The BSs 20 may be connected to one another via Xn interface.The BS 20 may be connected to one another via 5th generation (5G) corenetwork (5GC) and NG interface. More specifically, the BSs 20 may beconnected to an access and mobility management function (AMF) 30 viaNG-C interface, and may be connected to a user plane function (UPF) 30via NG-U interface.

Layers of a radio interface protocol between the UE and the network canbe classified into a first layer (layer 1, L1), a second layer (layer 2,L2), and a third layer (layer 3, L3) based on the lower three layers ofthe open system interconnection (OSI) model that is well-known in thecommunication system. Among them, a physical (PHY) layer belonging tothe first layer provides an information transfer service by using aphysical channel, and a radio resource control (RRC) layer belonging tothe third layer serves to control a radio resource between the UE andthe network. For this, the RRC layer exchanges an RRC message betweenthe UE and the BS.

FIG. 2 shows a radio protocol architecture, based on an embodiment ofthe present disclosure. The embodiment of FIG. 2 may be combined withvarious embodiments of the present disclosure. Specifically, (a) of FIG.2 shows a radio protocol stack of a user plane for Uu communication, and(b) of FIG. 2 shows a radio protocol stack of a control plane for Uucommunication. (c) of FIG. 2 shows a radio protocol stack of a userplane for SL communication, and (d) of FIG. 2 shows a radio protocolstack of a control plane for SL communication.

Referring to FIG. 2 , a physical layer provides an upper layer with aninformation transfer service through a physical channel. The physicallayer is connected to a medium access control (MAC) layer which is anupper layer of the physical layer through a transport channel. Data istransferred between the MAC layer and the physical layer through thetransport channel. The transport channel is classified according to howand with what characteristics data is transmitted through a radiointerface.

Between different physical layers, i.e., a physical layer of atransmitter and a physical layer of a receiver, data are transferredthrough the physical channel. The physical channel is modulated using anorthogonal frequency division multiplexing (OFDM) scheme, and utilizestime and frequency as a radio resource.

The MAC layer provides services to a radio link control (RLC) layer,which is a higher layer of the MAC layer, via a logical channel. The MAClayer provides a function of mapping multiple logical channels tomultiple transport channels. The MAC layer also provides a function oflogical channel multiplexing by mapping multiple logical channels to asingle transport channel. The MAC layer provides data transfer servicesover logical channels.

The RLC layer performs concatenation, segmentation, and reassembly ofRadio Link Control Service Data Unit (RLC SDU). In order to ensurediverse quality of service (QoS) required by a radio bearer (RB), theRLC layer provides three types of operation modes, i.e., a transparentmode (TM), an unacknowledged mode (UM), and an acknowledged mode (AM).An AM RLC provides error correction through an automatic repeat request(ARQ).

A radio resource control (RRC) layer is defined only in the controlplane. The RRC layer serves to control the logical channel, thetransport channel, and the physical channel in association withconfiguration, reconfiguration and release of RBs. The RB is a logicalpath provided by the first layer (i.e., the physical layer or the PHYlayer) and the second layer (i.e., a MAC layer, an RLC layer, a packetdata convergence protocol (PDCP) layer, and a service data adaptationprotocol (SDAP) layer) for data delivery between the UE and the network.

Functions of a packet data convergence protocol (PDCP) layer in the userplane include user data delivery, header compression, and ciphering.Functions of a PDCP layer in the control plane include control-planedata delivery and ciphering/integrity protection.

A service data adaptation protocol (SDAP) layer is defined only in auser plane. The SDAP layer performs mapping between a Quality of Service(QoS) flow and a data radio bearer (DRB) and QoS flow ID (QFI) markingin both DL and UL packets.

The configuration of the RB implies a process for specifying a radioprotocol layer and channel properties to provide a particular serviceand for determining respective detailed parameters and operations. TheRB can be classified into two types, i.e., a signaling RB (SRB) and adata RB (DRB). The SRB is used as a path for transmitting an RRC messagein the control plane. The DRB is used as a path for transmitting userdata in the user plane.

When an RRC connection is established between an RRC layer of the UE andan RRC layer of the E-UTRAN, the UE is in an RRC CONNECTED state, and,otherwise, the UE may be in an RRC_IDLE state. In case of the NR, anRRC_INACTIVE state is additionally defined, and a UE being in theRRC_INACTIVE state may maintain its connection with a core networkwhereas its connection with the BS is released.

Data is transmitted from the network to the UE through a downlinktransport channel. Examples of the downlink transport channel include abroadcast channel (BCH) for transmitting system information and adownlink-shared channel (SCH) for transmitting user traffic or controlmessages. Traffic of downlink multicast or broadcast services or thecontrol messages can be transmitted on the downlink-SCH or an additionaldownlink multicast channel (MCH). Data is transmitted from the UE to thenetwork through an uplink transport channel. Examples of the uplinktransport channel include a random access channel (RACH) fortransmitting an initial control message and an uplink SCH fortransmitting user traffic or control messages.

Examples of logical channels belonging to a higher channel of thetransport channel and mapped onto the transport channels include abroadcast channel (BCCH), a paging control channel (PCCH), a commoncontrol channel (CCCH), a multicast control channel (MCCH), a multicasttraffic channel (MTCH), etc.

FIG. 3 shows a structure of a radio frame of an NR, based on anembodiment of the present disclosure. The embodiment of FIG. 3 may becombined with various embodiments of the present disclosure.

Referring to FIG. 3 , in the NR, a radio frame may be used forperforming uplink and downlink transmission. A radio frame has a lengthof 10 ms and may be defined to be configured of two half-frames (HFs). Ahalf-frame may include five 1 ms subframes (SFs). A subframe (SF) may bedivided into one or more slots, and the number of slots within asubframe may be determined based on subcarrier spacing (SCS). Each slotmay include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

In case of using a normal CP, each slot may include 14 symbols. In caseof using an extended CP, each slot may include 12 symbols. Herein, asymbol may include an OFDM symbol (or CP-OFDM symbol) and a SingleCarrier-FDMA (SC-FDMA) symbol (or Discrete Fourier Transform-spread-OFDM(DFT-s-OFDM) symbol).

Table 2 shown below represents an example of a number of symbols perslot (N^(slot) _(symb)), a number slots per frame (N^(frame,u) _(slot)),and a number of slots per subframe (N^(subframe,u) _(slot)) based on anSCS configuration (u), in a case where a normal CP is used.

TABLE 2 SCS (15*2^(u)) N^(slot) _(symb) N^(frame, u) _(slot)N^(subframe, u) _(slot) 15 KHz (u = 0) 14 10 1 30 KHz (u = 1) 14 20 2 60KHz (u = 2) 14 40 4 120 KHz (u = 3)  14 80 8 240 KHz (u = 4)  14 160 16

Table 3 shows an example of a number of symbols per slot, a number ofslots per frame, and a number of slots per subframe based on the SCS, ina case where an extended CP is used.

TABLE 3 SCS (15*2^(u)) N^(slot) _(symb) N^(frame, u) _(slot)N^(subframe, u) _(slot) 60 KHz (u = 2) 12 40 4

In an NR system, OFDM(A) numerologies (e.g., SCS, CP length, and so on)between multiple cells being integrate to one UE may be differentlyconfigured. Accordingly, a (absolute time) duration (or section) of atime resource (e.g., subframe, slot or TTI) (collectively referred to asa time unit (TU) for simplicity) being configured of the same number ofsymbols may be differently configured in the integrated cells.

In the NR, multiple numerologies or SCSs for supporting diverse 5Gservices may be supported. For example, in case an SCS is 15 kHz, a widearea of the conventional cellular bands may be supported, and, in casean SCS is 30 kHz/60 kHz a dense-urban, lower latency, wider carrierbandwidth may be supported. In case the SCS is 60 kHz or higher, abandwidth that is greater than 24.25 GHz may be used in order toovercome phase noise.

An NR frequency band may be defined as two different types of frequencyranges. The two different types of frequency ranges may be FR1 and FR2.The values of the frequency ranges may be changed (or varied), and, forexample, the two different types of frequency ranges may be as shownbelow in Table 4. Among the frequency ranges that are used in an NRsystem, FR1 may mean a “sub 6 GHz range”, and FR2 may mean an “above 6GHz range” and may also be referred to as a millimeter wave (mmW).

TABLE 4 Frequency Range Corresponding frequency Subcarrier designationrange Spacing (SCS) FR1  450 MHz-6000 MHz  15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

As described above, the values of the frequency ranges in the NR systemmay be changed (or varied). For example, as shown below in Table 5, FR1may include a band within a range of 410 MHz to 7125 MHz. Morespecifically, FR1 may include a frequency band of 6 GHz (or 5850, 5900,5925 MHz, and so on) and higher. For example, a frequency band of 6 GHz(or 5850, 5900, 5925 MHz, and so on) and higher being included in FR1mat include an unlicensed band. The unlicensed band may be used fordiverse purposes, e.g., the unlicensed band for vehicle-specificcommunication (e.g., automated driving).

TABLE 5 Frequency Range Corresponding frequency Subcarrier designationrange Spacing (SCS) FR1  410 MHz-7125 MHz  15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

FIG. 4 shows a structure of a slot of an NR frame, based on anembodiment of the present disclosure. The embodiment of FIG. 4 may becombined with various embodiments of the present disclosure.

Referring to FIG. 4 , a slot includes a plurality of symbols in a timedomain. For example, in case of a normal CP, one slot may include 14symbols. However, in case of an extended CP, one slot may include 12symbols. Alternatively, in case of a normal CP, one slot may include 7symbols. However, in case of an extended CP, one slot may include 6symbols. A carrier includes a plurality of subcarriers in a frequencydomain. A Resource Block (RB) may be defined as a plurality ofconsecutive subcarriers (e.g., 12 subcarriers) in the frequency domain.A Bandwidth Part (BWP) may be defined as a plurality of consecutive(Physical) Resource Blocks ((P)RBs) in the frequency domain, and the BWPmay correspond to one numerology (e.g., SCS, CP length, and so on).

A carrier may include a maximum of N number BWPs (e.g., 5 BWPs). Datacommunication may be performed via an activated BWP. Each element may bereferred to as a Resource Element (RE) within a resource grid and onecomplex symbol may be mapped to each element.

Hereinafter, a bandwidth part (BWP) and a carrier will be described.

The BWP may be a set of consecutive physical resource blocks (PRBs) in agiven numerology. The PRB may be selected from consecutive sub-sets ofcommon resource blocks (CRBs) for the given numerology on a givencarrier

For example, the BWP may be at least any one of an active BWP, aninitial BWP, and/or a default BWP. For example, the UE may not monitordownlink radio link quality in a DL BWP other than an active DL BWP on aprimary cell (PCell). For example, the UE may not receive PDCCH,physical downlink shared channel (PDSCH), or channel stateinformation-reference signal (CSI-RS) (excluding RRM) outside the activeDL BWP. For example, the UE may not trigger a channel state information(CSI) report for the inactive DL BWP. For example, the UE may nottransmit physical uplink control channel (PUCCH) or physical uplinkshared channel (PUSCH) outside an active UL BWP. For example, in adownlink case, the initial BWP may be given as a consecutive RB set fora remaining minimum system information (RMSI) control resource set(CORESET) (configured by physical broadcast channel (PBCH)). Forexample, in an uplink case, the initial BWP may be given by systeminformation block (SIB) for a random access procedure. For example, thedefault BWP may be configured by a higher layer. For example, an initialvalue of the default BWP may be an initial DL BWP. For energy saving, ifthe UE fails to detect downlink control information (DCI) during aspecific period, the UE may switch the active BWP of the UE to thedefault BWP.

Meanwhile, the BWP may be defined for SL. The same SL BWP may be used intransmission and reception. For example, a transmitting UE may transmitan SL channel or an SL signal on a specific BWP, and a receiving UE mayreceive the SL channel or the SL signal on the specific BWP. In alicensed carrier, the SL BWP may be defined separately from a Uu BWP,and the SL BWP may have configuration signaling separate from the UuBWP. For example, the UE may receive a configuration for the SL BWP fromthe BS/network. For example, the UE may receive a configuration for theUu BWP from the BS/network. The SL BWP may be (pre-)configured in acarrier with respect to an out-of-coverage NR V2X UE and an RRC_IDLE UE.For the UE in the RRC CONNECTED mode, at least one SL BWP may beactivated in the carrier.

FIG. 5 shows an example of a BWP, based on an embodiment of the presentdisclosure. The embodiment of FIG. 5 may be combined with variousembodiments of the present disclosure. It is assumed in the embodimentof FIG. 5 that the number of BWPs is 3.

Referring to FIG. 5 , a common resource block (CRB) may be a carrierresource block numbered from one end of a carrier band to the other endthereof. In addition, the PRB may be a resource block numbered withineach BWP. A point A may indicate a common reference point for a resourceblock grid.

The BWP may be configured by a point A, an offset N^(start) _(BWP) fromthe point A, and a bandwidth N^(size) _(BWP). For example, the point Amay be an external reference point of a PRB of a carrier in which asubcarrier 0 of all numerologies (e.g., all numerologies supported by anetwork on that carrier) is aligned. For example, the offset may be aPRB interval between a lowest subcarrier and the point A in a givennumerology. For example, the bandwidth may be the number of PRBs in thegiven numerology.

Hereinafter, V2X or SL communication will be described.

A sidelink synchronization signal (SLSS) may include a primary sidelinksynchronization signal (PSSS) and a secondary sidelink synchronizationsignal (SSSS), as an SL-specific sequence. The PSSS may be referred toas a sidelink primary synchronization signal (S-PSS), and the SSSS maybe referred to as a sidelink secondary synchronization signal (S-SSS).For example, length-127 M-sequences may be used for the S-PSS, andlength-127 gold sequences may be used for the S-SSS. For example, a UEmay use the S-PSS for initial signal detection and for synchronizationacquisition. For example, the UE may use the S-PSS and the S-SSS foracquisition of detailed synchronization and for detection of asynchronization signal ID.

A physical sidelink broadcast channel (PSBCH) may be a (broadcast)channel for transmitting default (system) information which must befirst known by the UE before SL signal transmission/reception. Forexample, the default information may be information related to SLSS, aduplex mode (DM), a time division duplex (TDD) uplink/downlink (UL/DL)configuration, information related to a resource pool, a type of anapplication related to the SLSS, a subframe offset, broadcastinformation, or the like. For example, for evaluation of PSBCHperformance, in NR V2X, a payload size of the PSBCH may be 56 bitsincluding 24-bit cyclic redundancy check (CRC).

The S-PSS, the S-SSS, and the PSBCH may be included in a block format(e.g., SL synchronization signal (SS)/PSBCH block, hereinafter,sidelink-synchronization signal block (S-SSB)) supporting periodicaltransmission. The S-SSB may have the same numerology (i.e., SCS and CPlength) as a physical sidelink control channel (PSCCH)/physical sidelinkshared channel (PSSCH) in a carrier, and a transmission bandwidth mayexist within a (pre-)configured sidelink (SL) BWP. For example, theS-SSB may have a bandwidth of 11 resource blocks (RBs). For example, thePSBCH may exist across 11 RBs. In addition, a frequency position of theS-SSB may be (pre-)configured. Accordingly, the UE does not have toperform hypothesis detection at frequency to discover the S-SSB in thecarrier.

FIG. 6 shows a procedure of performing V2X or SL communication by a UEbased on a transmission mode, based on an embodiment of the presentdisclosure. The embodiment of FIG. 6 may be combined with variousembodiments of the present disclosure. In various embodiments of thepresent disclosure, the transmission mode may be called a mode or aresource allocation mode. Hereinafter, for convenience of explanation,in LTE, the transmission mode may be called an LTE transmission mode. InNR, the transmission mode may be called an NR resource allocation mode.

For example, (a) of FIG. 6 shows a UE operation related to an LTEtransmission mode 1 or an LTE transmission mode 3. Alternatively, forexample, (a) of FIG. 6 shows a UE operation related to an NR resourceallocation mode 1. For example, the LTE transmission mode 1 may beapplied to general SL communication, and the LTE transmission mode 3 maybe applied to V2X communication.

For example, (b) of FIG. 6 shows a UE operation related to an LTEtransmission mode 2 or an LTE transmission mode 4. Alternatively, forexample, (b) of FIG. 6 shows a UE operation related to an NR resourceallocation mode 2.

Referring to (a) of FIG. 6 , in the LTE transmission mode 1, the LTEtransmission mode 3, or the NR resource allocation mode 1, a basestation may schedule SL resource(s) to be used by a UE for SLtransmission. For example, in step S600, a base station may transmitinformation related to SL resource(s) and/or information related to ULresource(s) to a first UE. For example, the UL resource(s) may includePUCCH resource(s) and/or PUSCH resource(s). For example, the ULresource(s) may be resource(s) for reporting SL HARQ feedback to thebase station.

For example, the first UE may receive information related to dynamicgrant (DG) resource(s) and/or information related to configured grant(CG) resource(s) from the base station. For example, the CG resource(s)may include CG type 1 resource(s) or CG type 2 resource(s). In thepresent disclosure, the DG resource(s) may be resource(s)configured/allocated by the base station to the first UE through adownlink control information (DCI). In the present disclosure, the CGresource(s) may be (periodic) resource(s) configured/allocated by thebase station to the first UE through a DCI and/or an RRC message. Forexample, in the case of the CG type 1 resource(s), the base station maytransmit an RRC message including information related to CG resource(s)to the first UE. For example, in the case of the CG type 2 resource(s),the base station may transmit an RRC message including informationrelated to CG resource(s) to the first UE, and the base station maytransmit a DCI related to activation or release of the CG resource(s) tothe first UE.

In step S610, the first UE may transmit a PSCCH (e.g., sidelink controlinformation (SCI) or 1st-stage SCI) to a second UE based on the resourcescheduling. In step S620, the first UE may transmit a PSSCH (e.g.,2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the secondUE. In step S630, the first UE may receive a PSFCH related to thePSCCH/PSSCH from the second UE. For example, HARQ feedback information(e.g., NACK information or ACK information) may be received from thesecond UE through the PSFCH. In step S640, the first UE maytransmit/report HARQ feedback information to the base station throughthe PUCCH or the PUSCH. For example, the HARQ feedback informationreported to the base station may be information generated by the firstUE based on the HARQ feedback information received from the second UE.For example, the HARQ feedback information reported to the base stationmay be information generated by the first UE based on a pre-configuredrule. For example, the DCI may be a DCI for SL scheduling. For example,a format of the DCI may be a DCI format 3_0 or a DCI format 3_1.

Referring to (b) of FIG. 6 , in the LTE transmission mode 2, the LTEtransmission mode 4, or the NR resource allocation mode 2, a UE maydetermine SL transmission resource(s) within SL resource(s) configuredby a base station/network or pre-configured SL resource(s). For example,the configured SL resource(s) or the pre-configured SL resource(s) maybe a resource pool. For example, the UE may autonomously select orschedule resource(s) for SL transmission. For example, the UE mayperform SL communication by autonomously selecting resource(s) withinthe configured resource pool. For example, the UE may autonomouslyselect resource(s) within a selection window by performing a sensingprocedure and a resource (re)selection procedure. For example, thesensing may be performed in a unit of subchannel(s). For example, instep S610, a first UE which has selected resource(s) from a resourcepool by itself may transmit a PSCCH (e.g., sidelink control information(SCI) or 1st-stage SCI) to a second UE by using the resource(s). In stepS620, the first UE may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU,data, etc.) related to the PSCCH to the second UE. In step S630, thefirst UE may receive a PSFCH related to the PSCCH/PSSCH from the secondUE.

Referring to (a) or (b) of FIG. 6 , for example, a first UE may transmitSCI to a second UE on PSCCH. Alternatively, for example, a first UE maytransmit two consecutive SCI (e.g., 2-stage SCI) to a second UE on PSCCHand/or PSSCH. In this case, a second UE may decode two consecutive SCIs(e.g., 2-stage SCI) in order to receive the PSSCH from a first UE. Inthis specification, SCI transmitted on PSCCH may be referred to as a 1stSCI, SCI 1, 1st-stage SCI or 1st-stage SCI format, and SCI transmittedon the PSSCH may be referred to as a 2nd SCI, SCI 2, 2nd-stage SCI or2nd-stage SCI format. For example, the 1st-stage SCI format may includeSCI format 1-A, and the 2nd-stage SCI format may include SCI format 2-Aand/or SCI format 2-B. Table 6 shows an example of the 1st-stage SCIformat.

TABLE 6 3GPP TS 38.212 8.3.1.1 SCI format 1-A SCI format 1-A is used forthe scheduling of PSSCH and 2^(nd)-stage- SCI on PSSCH The followinginformation is transmitted by means of the SCI format 1-A:  Priority - 3bits as specified in clause 5.4.3.3 of [12, TS 23.287]  and clause5.22.1.3.1 of [8, TS 38.321]. Frequency resource assignment -$\left\lceil {\log_{2}\left( \frac{N_{subChannel}^{SL}\left( {N_{subChannel}^{SL} + 1} \right)}{2} \right)} \right\rceil$bits when the value of the higher layer parameter sl-MaxNumPerReserve isconfigured to 2; otherwise$\left\lceil {\log_{2}\left( \frac{{N_{su{bChannel}}^{SL}\left( {N_{subC{hannel}}^{SL} + 1} \right)}\left( {{2N_{subChannel}^{SL}} + 1} \right)}{6} \right)} \right\rceil$bits when the value of the higher layer parameter sl-MaxNumPerReserve isconfigured to 3, as defined in clause 8.1.2.2 of [6, TS 38.214]. Timeresource assignment - 5 bits when the value of the higher layerparameter sl-MaxNumPerReserve is configured to 2; otherwise 9 bits whenthe value of the higher layer parameter sl-MaxNumPerReserve isconfigured to 3, as defined in clause 8.1.2.1 of [6, TS 38.214].Resource reservation period - ┌log₂ N_(rsv)_period┐ bits as defined inclause 8.1.4 of [6, TS 38.214], where N_(rsv)_period is the number ofentries in the higher layer parameter sl-ResourceReservePeriodList, ifhigher layer parameter sl-MultiReserveResource is configured; 0 bitotherwise. DMRS pattern - ┌log₂ N_(pattern)┐ bits as defined in clause8.4.1.1.2 of [4, TS 38.211], where N_(pattern) is the number of DMRSpatterns configured by higher layer parameter sl-PSSCH-DMRS-TimePatternList. 2^(nd)-stage SCI format - 2 bits as defined in Table8.3.1.1-1. Beta_offset indicator - 2 bits as provided by higher layerparameter sl-BetaOffsets2ndSCI and Table 8.3.1.1-2. Number of DMRSport - 1 bit as defined in Table 8.3.1.1-3. Modulation and codingscheme - 5 bits as defined in clause 8.1.3 of [6, TS 38.214]. AdditionalMCS table indicator - as defined in clause 8.1.3.1 of [6, TS 38.214]: 1bit if one MCS table is configured by higher layer parametersl-Additional-MCS-Table; 2 bits if two MCS tables are configured byhigher layer parameter sl- Additional-MCS-Table; 0 bit otherwise. PSFCHoverhead indication - 1 bit as defined clause 8.1.3.2 of [6, TS 38.214]if higher layer parameter sl-PSFCH- Period = 2 or 4; 0 bit otherwise.Reserved - a number of bits as determined by higher layer parametersl-NumReservedBits, with value set to zero.

Table 7 shows an example of a 2nd-stage SCI format.

TABLE 7 8.4.1.1 SCI format 2-A SCI format 2-A is used for the decodingof PSSCH, with HARQ operation when HARQ- ACK information includes ACK orNACK, when HARQ-ACK information includes only NACK, or when there is nofeedback of HARQ-ACK information. The following information istransmitted by means of the SCI format 2-A:  - HARQ process number - 4bits as defined in clause 16.4 of [5, TS 38.213].  - New dataindicator - 1 bit as defined in clause 16.4 of [5, TS 38.213].  -Redundancy version - 2 bits as defined in clause 16.4 of [6, TS 38.214]. - Source ID - 8 bits as defined in clause 8.1 of [6, TS 38.214].  -Destination ID - 16 bits as defined in clause 8.1 of [6, TS 38.214].  -HARQ feedback enabled/disabled indicator - 1 bit as defined in clause16.3 of [5, TS 38.213].  - Cast type indicator - 2 bits as defined inTable 8.4.1.1-1.  - CSI request - 1 bit as defined in clause 8.2.1 of[6, TS 38.214]. 8.4.1.2  SCI format 2-B SCI format 2-B is used for thedecoding of PSSCH, with HARQ operation when HARQ- ACKinformationincludes only NACK, or when there is no feedback of HARQ-ACKinformation. The following information is transmitted by means of theSCI format 2-B:  - HARQ process number - 4 bits as defined in clause16.4 of [5, TS 38.213].  - New data indicator - 1 bit as defined inclause 16.4 of [5, TS 38.213].  - Redundancy version - 2 bits as definedin clause 16.4 of [6, TS 38.214].  - Source ID - 8 bits as defined inclause 8.1 of [6, TS 38.214].  - Destination ID - 16 bits as defined inclause 8.1 of [6, TS 38.214].  - HARQ feedback enabled/disabledindicator - 1 bit as defined in clause 16.3 of [5, TS 38.213].  - ZoneID - 12 bits as defined in clause 5.8.11 of [9, TS 38.331].  -Communication range requirement - 4 bits determined by higher layerparameter  sl-ZoneConfigMCR-Index.

Referring to (a) or (b) of FIG. 6 , in step S630, a first UE may receivethe PSFCH based on Table 8. For example, a first UE and a second UE maydetermine PSFCH resources based on Table 8, and a second UE may transmitHARQ feedback to a first UE using the PSFCH resource.

TABLE 8 3GPP TS 38.213 16.3 UE procedure for reporting HARQ-ACK onsidelink A UE can be indicated by an SCI format scheduling a PSSCHreception, in one or more sub-channels from a number of N_(subch)^(PSSCH) sub-channels, to transmit a PSFCH with HARQ-ACK information inresponse to the PSSCH reception. The UE provides HARQ- ACK informationthat includes ACK or NACK, or only NACK. A UE can be provided, bysl-PSFCH-Period-r16, a number of slots in a resource pool for a periodof PSFCH transmission occasion resources. If the number is zero, PSFCHtransmissions from the UE in the resource pool are disabled. A UEexpects that a slot t′_(k) ^(SL) (0 ≤ k < T′_(max)) has a PSFCHtransmission occasion resource if k mod N_(PSSCH) ^(PSFCH) = 0, wheret′_(k) ^(SL) is defined in [6, TS 38.214], and T′_(max) is a number ofslots that belong to the resource pool within 10240 msec according to[6, TS 38.214], and N_(PSSCH) ^(PSFCH) is provided bysl-PSFCH-Period-r16. A UE may be indicated by higher layers to nottransmit a PSFCH in response to a PSSCH reception [11, TS 38.321]. If aUE receives a PSSCH in a resource pool and the HARQ feedbackenabled/disabled indicator field in an associated SCI format 2-A or aSCI format 2-B has value 1 [5, TS 38.212], the UE provides the HARQ-ACKinformation in a PSFCH transmission in the resource pool. The UEtransmits the PSFCH in a first slot that includes PSFCH resources and isat least a number of slots, provided by sl-MinTimeGapPSFCH-r16, of theresource pool after a last slot of the PSSCH reception. A UE is providedby sl-PSFCH-RB-Set-r16 a set of M_(PRB, set) ^(PSFCH) PRBs in a resourcepool for PSFCH transmission in a PRB of the resource pool. For a numberof N_(subch) sub- channels for the resource pool, provided bysl-NumSubchannel, and a number of PSSCH slots associated with a PSFCHslot that is less than or equal to N_(PSSCH) ^(PSFCH), the UE allocatesthe (i + j · N_(PSSCH) ^(PSFCH)) · M_(subch, slot) ^(PSFCH), (i + 1 + j· N_(PSSCH) ^(PSFCH)) · M_(subch, slot) ^(PSFCH) − 1) PRBs from theM_(PRB, set) ^(PSFCH) PRBs to slot i among the PSSCH slots associatedwith the PSFCH slot and sub-channel j, where M_(subch, slot) ^(PSFCH) =M_(PRB, set) ^(PSFCH)/(N_(subch) · N_(PSSCH) ^(PSFCH)), 0 ≤ i <N_(PSSCH) ^(PSFCH), 0 ≤ j < N_(subch), and the allocation starts in anascending order of i and continues in an ascending order of j. The UEexpects that M_(PRB, set) ^(PSFCH) is a multiple of N_(subch) ·N_(PSSCH) ^(PSFCH). A UE determines a number of PSFCH resourcesavailable for multiplexing HARQ-ACK information in a PSFCH transmissionas R_(PRB, CS) ^(PSFCH) = N_(type) ^(PSFCH) · M_(subch, slot) ^(PSFCH) ·N_(CS) ^(PSFCH) where N_(CS) ^(PSFCH) is a number of cyclic shift pairsfor the resource pool and, based on an indication by higher layers,  -N_(type) ^(PSFCH) = 1 and the M_(subch, slot) ^(PSFCH) PRBs areassociated with the starting sub-channel of the corresponding PSSCH  -N_(type) ^(PSFCH) = N_(subch) ^(PSSCH) and the N_(subch) ^(PSSCH) ·M_(subch, slot) ^(PSFCH) PRBs are associated with one or moresub-channels from the N_(subch) ^(PSSCH) sub-channels of thecorresponding PSSCH

Referring to (a) of FIG. 6 , in step S640, the first UE may transmit SLHARQ feedback to the base station through the PUCCH and/or the PUSCH.

FIG. 7 shows three cast types, in accordance with an embodiment of thepresent disclosure. The embodiment of FIG. 7 may be combined withvarious embodiments of the present disclosure. Specifically, FIG. 7(a)shows broadcast-type SL communication, FIG. 7(b) shows unicast type-SLcommunication, and FIG. 7(c) shows groupcast-type SL communication. Incase of the unicast-type SL communication, a UE may perform one-to-onecommunication with respect to another UE. In case of the groupcast-typeSL transmission, the UE may perform SL communication with respect to oneor more UEs in a group to which the UE belongs. In various embodimentsof the present disclosure, SL groupcast communication may be replacedwith SL multicast communication, SL one-to-many communication, or thelike.

In this specification, the “configure or define” wording may beinterpreted as being (pre)configured (via pre-defined signaling (e.g.,SIB, MAC signaling, RRC signaling)) from a base station or a network.For example, “A may be configured” may include “that a base station ornetwork (pre-)configures/defines or informs A for a UE”. Alternatively,the wording “configure or define” may be interpreted as being configuredor defined in advance by a system. For example, “A may be configured”may include “A is configured/defined in advance by a system”.

Referring to the standard document, some procedures and technicalspecifications related to the present disclosure are shown in Tables 9to 12 below.

TABLE 9 3GPP TS 38.321 V16.2.1 The MAC entity may be configured by RRCwith a DRX functionality that controls the UE's PDCCH monitoringactivity for the MAC entity's C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI,SFI-RNTI, SP-CSI-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, TPC- SRS-RNTI,and AI-RNTI. When using DRX operation, the MAC entity shall also monitorPDCCH according to requirements found in other clauses of thisspecification. When in RRC_CONNECTED, if DRX is configured, for all theactivated Serving Cells, the MAC entity may monitor the PDCCHdiscontinuously using the DRX operation specified in this clause;otherwise the MAC entity shall monitor the PDCCH as specified in TS38.213 [6].  NOTE 1:   If Sidelink resource allocation mode 1 isconfigured by RRC, a DRX  functionality is not configured. RRC controlsDRX operation by configuring the following parameters:  -drx-onDurationTimer: the duration at the beginning of a DRX cycle;  -drx-SlotOffset: the delay before starting the drx-onDurationTimer;  -drx-InactivityTimer: the duration after the PDCCH occasion in which aPDCCH indicates a new UL or DL transmission for the MAC entity;  -drx-RetransmissionTimerDL (per DL HARQ process except for the broadcastprocess): the maximum duration until a DL retransmission is received;  -drx-RetransmissionTimerUL (per UL HARQ process): the maximum durationuntil a grant for UL retransmission is received;  -drx-LongCycleStartOffset: the Long DRX cycle and drx-StartOffset whichdefines the subframe where the Long and Short DRX cycle starts;  -drx-ShortCycle (optional): the Short DRX cycle;  - drx-ShortCycleTimer(optional): the duration the UE shall follow the Short DRX cycle;  -drx-HARQ-RTT-TimerDL (per DL HARQ process except for the broadcastprocess): the minimum duration before a DL assignment for HARQretransmission is expected by the MAC entity;  - drx-HARQ-RTT-TimerUL(per UL HARQ process): the minimum duration before a UL HARQretransmission grant is expected by the MAC entity;  - ps-Wakeup(optional): the configuration to start associated drx-onDurationTimer incase DCP is monitored but not detected;  - ps-TransmitOtherPeriodicCSI(optional): the configuration to report periodic CSI that is not L1-RSRPon PUCCH during the time duration indicated by drx- onDurationTimer incase DCP is configured but associated drx-onDurationTimer is notstarted;  - ps-TransmitPeriodicL1-RSRP (optional): the configuration totransmit periodic CSI that is L1-RSRP on PUCCH during the time durationindicated by drx- onDurationTimer in case DCP is configured butassociated drx-onDurationTimer is not started.

Clean Substitute Specification Docket No. 2101-73217

TABLE 10 Serving Cells of a MAC entity may be configured by RRC in twoDRX groups with separate DRX parameters. When RRC does not configure asecondary DRX group, there is only one DRX group and all Serving Cellsbelong to that one DRX group. When two DRX groups are configured, eachServing Cell is uniquely assigned to either of the two groups. The DRXparameters that are separately configured for each DRX group are:drx-onDurationTimer, drx-InactivityTimer. The DRX parameters that arecommon to the DRX groups are: drx-SlotOffset, drx-RetransmissionTimerDL,drx- RetransmissionTimerUL, drx-LongCycleStartOffset, drx-ShortCycle(optional), drx- ShortCycleTimer (optional), drx-HARQ-RTT-TimerDL, anddrx-HARQ-RTT-TimerUL. When a DRX cycle is configured, the Active Timefor Serving Cells in a DRX group includes the time while:  -drx-onDurationTimer or drx-InactivityTimer configured for the DRX groupis running; or  - drx-RetransmissionTimerDL or drx-RetransmissionTimerULis running on any Serving Cell in the DRX group; or  -ra-ContentionResolutionTimer (as described in clause 5.1.5) or msgB-ResponseWindow (as described in clause 5.1.4a) is running; or  - aScheduling Request is sent on PUCCH and is pending (as described inclause 5.4.4); or  - a PDCCH indicating a new transmission addressed tothe C-RNTI of the MAC entity has not been received after successfulreception of a Random Access Response for the Random Access Preamble notselected by the MAC entity among the contention-based Random AccessPreamble (as described in clauses 5.1.4 and 5.1.4a). When DRX isconfigured, the MAC entity shall:  1> if a MAC PDU is received in aconfigured downlink assignment: 2> start the drx-HARQ-RTT-TimerDL forthe corresponding HARQ process in the first symbol after the end of thecorresponding transmission carrying the DL HARQ feedback; 2> stop thedrx-RetransmissionTimerDL for the corresponding HARQ process.  1> if aMAC PDU is transmitted in a configured uplink grant and LBT failureindication is not received from lower layers: 2> start thedrx-HARQ-RTT-TimerUL for the corresponding HARQ process in the firstsymbol after the end of the first repetition of the corresponding PUSCHtransmission; 2> stop the drx-RetransmissionTimerUL for thecorresponding HARQ process.  1> if a drx-HARQ-RTT-TimerDL expires: 2> ifthe data of the corresponding HARQ process was not successfully decoded:3> start the drx-RetransmissionTimerDL for the corresponding HARQprocess in the first symbol after the expiry of drx-HARQ-RTT-TimerDL. 1> if a drx-HARQ-RTT-TimerUL expires: 2> start thedrx-RetransmissionTimerUL for the corresponding HARQ process in thefirst symbol after the expiry of drx-HARQ-RTT-TimerUL.  1> if a DRXCommand MAC CE or a Long DRX Command MAC CE is received: 2> stopdrx-onDurationTimer for each DRX group; 2> stop drx-InactivityTimer foreach DRX group.  1> if drx-InactivityTimer for a DRX group expires: 2>if the Short DRX cycle is configured: 3> start or restartdrx-ShortCycleTimer for this DRX group in the first symbol after theexpiry of drx-InactivityTimer; 3> use the Short DRX cycle for this DRXgroup. 2> else: 3> use the Long DRX cycle for this DRX group.  1> if aDRX Command MAC CE is received: 2> if the Short DRX cycle is configured:3> start or restart drx-ShortCycleTimer for each DRX group in the firstsymbol after the end of DRX Command MAC CE reception; 3> use the ShortDRX cycle for each DRX group. 2> else: 3> use the Long DRX cycle foreach DRX group.  1> if drx-ShortCycleTimer for a DRX group expires: 2>use the Long DRX cycle for this DRX group.  1> if a Long DRX Command MACCE is received: 2> stop drx-ShortCycleTimer for each DRX group; 2> usethe Long DRX cycle for each DRX group.  1> if the Short DRX cycle isused for a DRX group, and [(SFN × 10) + subframe number] modulo(drx-ShortCycle) = (drx-StartOffset) modulo (drx-ShortCycle): 2> startdrx-onDurationTimer for this DRX group after drx-SlotOffset from thebeginning of the subframe.

TABLE 11 1> if the Long DRX cycle is used for a DRX group, and [(SFN ×10) + subframe number] modulo (drx-LongCycle) = drx-StartOffset: 2> ifDCP monitoring is configured for the active DL BWP as specified in TS38.213 [6], clause 10.3: 3> if DCP indication associated with thecurrent DRX cycle received from lower layer indicated to startdrx-onDurationTimer, as specified in TS 38.213 [6]; or 3> if all DCPoccasion(s) in time domain, as specified in TS 38.213 [6], associatedwith the current DRX cycle occurred in Active Time consideringgrants/assignments/DRX Command MAC CE/Long DRX Command MAC CE receivedand Scheduling Request sent until 4 ms prior to start of the last DCPoccasion, or within BWP switching interruption length, or during ameasurement gap, or when the MAC entity monitors for a PDCCHtransmission on the search space indicated by recoverySearchSpaceId ofthe SpCell identified by the C-RNTI while the ra-ResponseWindow isrunning (as specified in clause 5.1.4); or 3> if ps-Wakeup is configuredwith value true and DCP indication associated with the current DRX cyclehas not been received from lower layers: 4> start drx-onDurationTimerafter drx-SlotOffset from the beginning of the subframe. 2> else: 3>start drx-onDurationTimer for this DRX group after drx-SlotOffset fromthe beginning of the subframe. NOTE 2: In case of unaligned SFN acrosscarriers in a cell group, the SFN of the SpCell is used to calculate theDRX duration. 1> if a DRX group is in Active Time: 2> monitor the PDCCHon the Serving Cells in this DRX group as specified in TS 38.213 [6]; 2>if the PDCCH indicates a DL transmission: 3> start thedrx-HARQ-RTT-TimerDL for the corresponding HARQ process in the firstsymbol after the end of the corresponding transmission carrying the DLHARQ feedback; NOTE 3: When HARQ feedback is postponed byPDSCH-to-HARQ_feedback timing indicating a non-numerical k1 value, asspecified in TS 38.213 [6], the corresponding transmission opportunityto send the DL HARQ feedback is indicated in a later PDCCH requestingthe HARQ-ACK feedback. 3> stop the drx-RetransmissionTimerDL for thecorresponding HARQ process. 3> if the PDSCH-to-HARQ_feedback timingindicate a non-numerical k1 value as specified in TS 38.213 [6]: 4>start the drx-RetransmissionTimerDL in the first symbol after the PDSCHtransmission for the corresponding HARQ process. 2> if the PDCCHindicates a UL transmission: 3> start the drx-HARQ-RTT-TimerUL for thecorresponding HARQ process in the first symbol after the end of thefirst repetition of the corresponding PUSCH transmission; 3> stop thedrx-RetransmissionTimerUL for the corresponding HARQ process. 2> if thePDCCH indicates a new transmission (DL or UL) on a Serving Cell in thisDRX group: 3> start or restart drx-InactivityTimer for this DRX group inthe first symbol after the end of the PDCCH reception. 2> if a HARQprocess receives downlink feedback information and acknowledgement isindicated: 3> stop the drx-RetransmissionTimerUL for the correspondingHARQ process. 1> if DCP monitoring is configured for the active DL BWPas specified in TS 38.213 [6], clause 10.3; and 1> if the current symboln occurs within drx-onDurationTimer duration; and 1> ifdrx-onDurationTimer associated with the current DRX cycle is not startedas specified in this clause: 2> if the MAC entity would not be in ActiveTime considering grants/assignments/DRX Command MAC CE/Long DRX CommandMAC CE received and Scheduling Request sent until 4 ms prior to symbol nwhen evaluating all DRX Active Time conditions as specified in thisclause: 3> not transmit periodic SRS and semi-persistent SRS defined inTS 38.214 [7]; 3> not report semi-persistent CSI configured on PUSCH; 3>if ps-TransmitPeriodicL1-RSRP is not configured with value true: 4> notreport periodic CSI that is L1-RSRP on PUCCH. 3> ifps-TransmitOtherPeriodicCSI is not configured with value true: 4> notreport periodic CSI that is not L1-RSRP on PUCCH.

TABLE 12  1> else: 2> in current symbol n, if a DRX group would not bein Active Time considering grants/assignments scheduled on ServingCell(s) in this DRX group and DRX Command MAC CE/Long DRX Command MAC CEreceived and Scheduling Request sent until 4 ms prior to symbol n whenevaluating all DRX Active Time conditions as specified in this clause:3> not transmit periodic SRS and semi-persistent SRS defined in TS38.214 [7] in this DRX group; 3> not report CSI on PUCCH andsemi-persistent CSI configured on PUSCH in this DRX group. 2> if CSImasking (csi-Mask) is setup by upper layers: 3> in current symbol n, ifdrx-onDurationTimer of a DRX group would not be running consideringgrants/assignments scheduled on Serving Cell(s) in this DRX group andDRX Command MAC CE/Long DRX Command MAC CE received until 4 ms prior tosymbol n when evaluating all DRX Active Time conditions as specified inthis clause; and 4>not report CSI on PUCCH in this DRX group.  NOTE 4:If a UE multiplexes a CSI configured on PUCCH with other overlappingUCI(s) according to the procedure specified in TS 38.213 [6] clause9.2.5 and this CSI multiplexed with other UCI(s) would be reported on aPUCCH resource outside DRX Active Time of the DRX group in which thisPUCCH is configured, it is up to UE implementation whether to reportthis CSI multiplexed with other UCI(s). Regardless of whether the MACentity is monitoring PDCCH or not on the Serving Cells in a DRX group,the MAC entity transmits HARQ feedback, aperiodic CSI on PUSCH, andaperiodic SRS defined in TS 38.214 [7] on the Serving Cells in the DRXgroup when such is expected. The MAC entity needs not to monitor thePDCCH if it is not a complete PDCCH occasion (e.g. the Active Timestarts or ends in the middle of a PDCCH occasion).

FIG. 8 shows an example of a DRX period according to an embodiment ofthe present disclosure. The embodiment of FIG. 8 may be combined withvarious embodiments of the present disclosure.

Referring to FIG. 8 , a UE uses DRX in RRC_IDLE and RRC_INACTIVE statesto reduce power consumption. When DRX is configured, the UE performs aDRX operation according to the DRX configuration information. A UEoperating as a DRX repeatedly turns on and off a reception task.

For example, when DRX is configured, a UE attempts to receive a PDCCH,which is a downlink channel, only within a pre-configured time interval,and does not attempt to receive the PDCCH within the remaining timeinterval. The time period in which the UE should attempt PDCCH receptionis called an on-duration period, and the on-duration period is definedonce per DRX cycle.

Meanwhile, there is a problem in that discontinuous reception (DRX)configuration and operation for sidelink (SL) communication are notpreviously defined. For example, when a UE performing an SL DRXoperation selects an SL transmission resource based on resource sensingin mode 2 operation, when the selected resource needs to be reselectedby aperiodic traffic (re-evaluation) or a previously selected andreserved resource needs to be reselected (pre-emption), an operation andprocess performed in consideration of power saving of a DRX UE may be animportant technical element. For example, in the present disclosure, theexpression of reselecting a specific resource may mean giving up aspecific resource and selecting a new resource, or giving up anotherresource and newly selecting the specific resource.

According to an embodiment of the present disclosure, a re-evaluationmethod and a resource pre-emption operation when a UE performing an SLDRX operation operates in mode 2, and a device supporting them areproposed. For example, in the present disclosure, the term specificthreshold value may mean a value defined in advance, set or preset by anetwork/higher layer. For example, in the present disclosure, the termspecific offset (value) may mean a value set through upper layer RRCsignaling, signaled through medium access control (MAC) control element(CE), or set/signaled through downlink control information (DCI).Hereinafter, a UE performing an SL DRX operation is referred to as an SLDRX UE, and a UE not performing an SL DRX operation is referred to as anon-DRX UE.

According to an embodiment of the present disclosure, an SL DRX UE maynot perform re-evaluation on transmission resources selected throughchannel sensing in mode 2 operation for power saving. That is, forexample, resource re-evaluation may be performed for non-DRX UEs and maynot be performed for DRX UEs.

According to an embodiment of the present disclosure, when an SLtransmission resource reservation of another UE and a selected SLtransmission resource collide, as a result of detection throughcontinuous sensing from the time when the UE selects the SL transmissionresource based on sensing in mode 2 operation to before the transmissiontime, the UE may randomly select a new SL transmission resource fromamong the remaining candidate transmission resources, after excludingcandidate transmission resources belonging to the time interval up tothe time of detecting the resource collision among candidatetransmission resources, at the time of selecting the SL transmissionresource. For example, through this, power consumption due to additionalcandidate resource selection may be reduced.

Alternatively, for example, when no valid SL candidate transmissionresources remain among the remaining candidate transmission resources,or when there are no valid SL candidate transmission resources remainingwithin the packet delay budget (PDB) of a transport block (TB) to betransmitted, a DRX UE may perform random selection.

Or, for example, as in the case described above, if there is no valid SLcandidate transmission resource remaining among the candidatetransmission resources, when the selection window is set only in theactive time duration by default, a UE may extend the selection window toinclude the inactive time duration within the PDB.

According to an embodiment of the present disclosure, in the case ofextending an on-duration or active time with an inactivity timer or aretransmission timer, etc., since resource reselection may be performeddue to resource re-evaluation or a pre-emption operation, a DRX UE mayperform active time extension based on a specific threshold or margin ofa specific offset value. For example, in the case of extending thelength of an extended active time duration by adding the margin to theset timer value, or, when an active time duration is generated based ona retransmission timer after an SL hybrid automatic repeat request(HARQ) round trip time (RTT) timer operation, the active time durationmay be generated by adding the margin to the set retransmission timervalue before and after the generated active time duration.

FIG. 9 shows an example in which an active time is extended by a timeoffset according to an embodiment of the present disclosure. Theembodiment of FIG. 9 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 9 , for example, a first timer may be an on-durationtimer of SL DRX configuration. For example, an active time, which is thetime a UE is in an active mode, may basically mean a period in which theon-duration timer is on, and may be extended based on other timers of anSL DRX configuration. A UE may perform SL communication includingtransmission/reception of SL data during active time. For example, asecond timer may be another timer of an SL DRX configuration. Forexample, the other timer may include an SL DRX inactivity timer or an SLDRX retransmission timer of SL DRX configuration. For example, theactive time may end after a time offset from an end of a time intervalin which at least one of the first timer or the second timer isoperating. The time offset may be preset for a UE or signaled to the UEfrom a higher layer according to various embodiments of the presentdisclosure.

FIG. 10 shows a procedure in which a first device determines whether ornot to pre-empt an SL resource according to an embodiment of the presentdisclosure. The embodiment of FIG. 10 may be combined with variousembodiments of the present disclosure.

Referring to FIG. 10 , in step S1010, a first device may select an SLresource to be used for its own SL transmission. In step S1020, thefirst device may receive information related to an SL resource from asecond device. The information related to the SL resource may include apriority value of the second device related to pre-emption. For example,SL transmissions of the first device and the second device may collidein the SL resource. That is, a pre-emption operation may have to beperformed in order for the first device or the second device to use theSL resource. In step S1030, the first device may determine whether togive up the SL resource and perform resource reselection. For example,this operation may refer to an operation of performing prioritizationfor pre-emption. The first device may determine whether to perform theresource reselection by comparing a priority value of the second devicerelated to the pre-emption with a threshold value included in the firstdevice. For example, when the priority value of the second device issmaller than the threshold value, the first device may determine toperform resource reselection.

According to an embodiment of the present disclosure, an SL DRX UE mayselect an SL transmission resource through channel sensing in mode 2operation for power saving, and when information related to the reservedSL transmission resource is signaled through SCI, the SL DRX UE may notperform re-evaluation according to a pre-emption from another UE. Thatis, for example, resource re-evaluation by pre-emption may be performedfor non-DRX UEs and may not be performed for DRX UEs.

According to an embodiment of the present disclosure, a specificthreshold value related to the priority level used by a DRX UE forcomparison for pre-emption determination may be set differently from aspecific threshold value related to the priority level that a non-DRX UEuses for comparison for pre-emption determination. For example, since aDRX UE may have a lower degree of freedom in selecting a transmissionresource than a non-DRX UE, a specific threshold value related to thepriority level used for comparison for pre-emption determination, whichis set for a DRX UE, may be set smaller than that of a non-DRX UE. Thatis, for example, in the case of an SL DRX UE, a priority value relatedto SL transmission of other UE can be pre-empted only when it has asmaller priority value than that of a non-DRX UE.

FIG. 11 shows an example of a priority value related to a pre-emptionaccording to an embodiment of the present disclosure. The embodiment ofFIG. 11 may be combined with various embodiments of the presentdisclosure.

Referring to FIG. 11 , a threshold value used for comparison of priorityvalues related to a pre-emption is shown. For example, when a firstdevice compares a priority value related to SL transmission of a seconddevice with a threshold value in order to determine a pre-emption for anSL resource, if the priority value is smaller than the threshold value,it is determined that the SL transmission of the second device haspriority, and the first device may give up the SL resource and performresource reselection for a new resource. Referring to FIG. 11 , a firstthreshold and a second threshold are shown. The first threshold valuemay be a threshold value used for comparing the priority values in thecase where the first device performs low-priority transmission(low-priority level transmission) through the SL resource, and thesecond threshold value may be a threshold value used for comparison ofthe priority values when the transmission that the first device intendsto perform through the SL resource has a high priority. For example,various embodiments described in this disclosure may be applied to thepriority level of transmission to be performed by the first devicethrough the SL resource.

According to an embodiment of the present disclosure, the priority of awakeup indication signal (WIS) including activation/deactivationinformation related to the time at which a receiving UE needs to wakeup, transmitted from the transmitting UE to the receiving UE may be setto a higher priority than service data and a lower priority than thepriority of an RRC message, which is higher layer signaling. That is,for example, the priority value of a WIS may be set higher than thepriority value of an RRC message while being smaller than the priorityvalue of the service data. For example, the WIS-related priority may bea logical channel priority or an L (layer)-1 priority.

For example, the level of the priority level to be compared may be setdifferently in order to determine the pre-emption for a DRX UE,according to SL DRX related UE type (DRX UE or non-DRX UE), inter-UEcoordination related UE type (relaying UE or relayed remote UE)transmitted through sidelink control information (SCI) or WIS, activetime extension, etc. For example, since an SL transmission of DRX UE orrelaying UE, WIS transmission, or SL transmission in an on-durationsection may be SL transmission that needs to be relatively moreprotected than other SL transmissions, a high priority level (a smallerpriority value) may be set for the transmissions. On the other hand, forSL transmission of a non-DRX UE or a relayed remote UE or SLtransmission in an active time duration extended by an inactivity timeror a retransmission timer, the priority level may be set low (greaterpriority value).

According to an embodiment of the present disclosure, in an on-durationperiod, a high priority, high reliability, or low latency packet may betransmitted, and a pre-emption may not be applied to SL transmission ofthe packet or the on-duration period. Conversely, for example, in anactive time duration extended by an inactivity timer or a retransmissiontimer, a low-priority, low-reliability, or high-latency packet may betransmitted, and pre-emption may be applied to SL transmission for thepacket or the extended active time period.

According to an embodiment of the present disclosure, in an embodiment,when a packet transmitted by a first UE is pre-empted by a second UEtransmitting a packet with a lower priority, a first UE transmitting thepacket with the high priority may lower the frequency of performingresource re-evaluation by pre-emption after resource selection orresource reservation, by making the second UE detect a conflictingresource that generates the pre-emption through sensing and performresource (re)selection to select a transmission resource based on this.For example, this operation may enable stable selection of SLtransmission resources, in particular, when SL resources for sensing andresource selection are limited, such as a UE performing partial sensingor a DRX UE. For example, when the second UE performs partial sensing,the first UE may reserve (indicate) a resource through SCI to transmit apacket of high priority through the resource on which partial sensing isperformed, where the second UE is likely to cause a pre-emption. Or, forexample, the first UE may reserve (indicate) at least one resourcethrough SCI so that initial transmission and retransmission related tothe TB transmitted by the first UE can be transmitted through at leastone resource among resources for which the second UE performs partialsensing.

For example, for the above-described operation, partial sensing targetslot information may be previously known to neighboring UEs, transmittedthrough a base station, or shared by a UE performing partial sensing.

According to various embodiments of the present disclosure, in the caseof an SL UE operating on a battery basis, a power saving gain may beobtained by performing an SL DRX operation based on SL DRXconfiguration.

When an on-duration or active time is extended by an inactivity timer ora retransmission timer, resource reselection may be performed due toresource re-evaluation or a pre-emption operation. At this time, whenthe receiving UE performing the SL DRX operation is in sleep mode, SLreception may not be performed due to the resource reselection. Here,through the method described in this disclosure, a receiving UE cannormally perform SL reception by performing active time extension basedon a margin of a specific threshold value or a specific offset value.

FIG. 12 shows a procedure for a first device to perform wirelesscommunication based on a sidelink (SL) discontinuous reception (DRX)configuration according to an embodiment of the present disclosure. Theembodiment of FIG. 12 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 12 , in step S1210, a first device, may start a firsttimer related to an on-duration time. In step S1220, the first devicemay start a second timer. In step S1230, the first device may perform SLcommunication within an active time. For example, the active time maystart at a first time point at which the first timer or the second timeris started, and the active time may end at a second time point after atime offset value from a time point at which the second timer expires.

For example, additionally, the first device may receive, from a seconddevice, information related to an SL resource, including a priorityvalue; and determine whether to perform resource reselection based on athreshold related to pre-emption and the priority value. For example,the SL communication may comprise selecting the SL resource within theactive time.

For example, additionally, the first device may perform the resourcereselection, based on the priority value being smaller than thethreshold.

For example, the threshold may be a first threshold, based on the firstdevice performing an SL DRX operation, and the threshold may be a secondthreshold different from the first threshold, based on the first devicenot performing an SL DRX operation.

For example, the threshold may be the first threshold, based on the SLcommunication being performed within the on-duration time, and firstthreshold may be smaller than the second threshold.

For example, the priority value may be a first value, based on thepriority value being related to a wakeup indication signal (WIS), thepriority value may be a second value, based on the priority value beingrelated to a radio resource control (RRC) signaling, the priority valuemay be a third value, based on the priority value being related to datarelated to an SL service, and the first value smaller than the thirdvalue may be greater than the second value.

For example, the priority value may be a first value, based on thepriority value being related to relay communication, and the priorityvalue may be a second value greater than the first value, based on thepriority value being not related to relay communication.

For example, the priority value may be a logical channel priority orlayer (L)-1 priority, based on the priority value being related to aWIS.

For example, additionally, the first device may receive, from a basestation, the time offset value through at least one of an RRC message, amedium access control (MAC) control element (CE) or downlink controlinformation (DCI).

For example, resource reselection may be not performed, based on thefirst device performing an SL DRX operation.

For example, the performed SL communication may comprise: determining asensing window; performing sensing within the sensing window; selectinga first SL resource within a first selection window, based on a resultof the sensing, wherein the first selection window may be includedwithin the active time; reselecting a second SL resource within a secondselection window within packet delay budget (PDB) of SL data, based oncollision of the first SL resource and the first selection window notincluding any available resource, wherein the second selection windowmay be not included within the active time; and transmitting, to asecond device, the SL data based on the second SL resource.

For example, additionally, the first device may receive, from a seconddevice, information related to an SL resource, including a priorityvalue; and determine whether to perform resource reselection based on athreshold related to pre-emption and the priority value, based on the SLresource within the active time is not included within the on-durationtime. For example, the SL communication may comprise: selectin the SLresource within the active time, and the resource reselection may be notperformed, based on the SL resource being included within theon-duration time.

For example, additionally, the first device may transmit, to a seconddevice, sidelink control information (SCI) including information relatedto partial sensing. For example, at least one of an initial transmissionor a retransmission for SL data of a priority value smaller than athreshold may be transmitted from the second device through an SLresource within the partial sensing region, based on the informationrelated to the partial sensing.

The above-described embodiment may be applied to various devicesdescribed below. For example, a processor 102 of a first device 100, maystart a first timer related to an on-duration time. And, the processor102 of the first device 100 may start a second timer. And, the processor102 of the first device 100 may perform SL communication within anactive time. For example, the active time may start at a first timepoint at which the first timer or the second timer is started, and theactive time may end at a second time point after a time offset valuefrom a time point at which the second timer expires.

According to an embodiment of the present disclosure, a first device forperforming wireless communication may be proposed. For example, thefirst device may comprise: one or more memories storing instructions;one or more transceivers; and one or more processors connected to theone or more memories and the one or more transceivers. For example, theone or more processors may execute the instructions to: start a firsttimer related to an on-duration time; start a second timer; and performSL communication within an active time, wherein the active time maystart at a first time point at which the first timer or the second timeris started, and wherein the active time may end at a second time pointafter a time offset value from a time point at which the second timerexpires.

According to an embodiment of the present disclosure, a device adaptedto control a first user equipment (UE) may be proposed. For example, thedevice may comprise: one or more processors; and one or more memoriesoperably connectable to the one or more processors and storinginstructions. For example, the one or more processors may execute theinstructions to: start a first timer related to an on-duration time;start a second timer; and perform SL communication within an activetime, wherein the active time may start at a first time point at whichthe first timer or the second timer is started, and wherein the activetime may end at a second time point after a time offset value from atime point at which the second timer expires.

According to an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be proposed.For example, the instructions, when executed, may cause a first deviceto: start a first timer related to an on-duration time; start a secondtimer; and perform SL communication within an active time, wherein theactive time may start at a first time point at which the first timer orthe second timer is started, and wherein the active time may end at asecond time point after a time offset value from a time point at whichthe second timer expires.

FIG. 13 shows a procedure for a second device to perform wirelesscommunication according to an embodiment of the present disclosure. Theembodiment of FIG. 13 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 13 , in step S1310, a second device may performsidelink (SL) communication with a first device within an active time.For example, the active time may start at a first time point at which afirst timer related to an on-duration time of an SL discontinuousreception (DRX) configuration or a second timer of the SL DRXconfiguration, and the active time may end at a second time point aftera time offset value from a time point at which the second timer expires.

For example, the performed SL communication may comprise: receiving,from the first device, sidelink control information (SCI) includinginformation related to partial sensing; performing the partial sensingbased on SL data of a priority value smaller than a threshold; selectingan SL resource within the partial sensing region; and performing atleast one of an initial transmission or a retransmission for the SLdata, based on the SL resource.

The above-described embodiment may be applied to various devicesdescribed below. For example, a processor 202 of a second device 200 mayperform sidelink (SL) communication with a first device 100 within anactive time. For example, the active time may start at a first timepoint at which a first timer related to an on-duration time of an SLdiscontinuous reception (DRX) configuration or a second timer of the SLDRX configuration, and the active time may end at a second time pointafter a time offset value from a time point at which the second timerexpires.

According to an embodiment of the present disclosure, a second devicefor performing wireless communication may be proposed. For example, thesecond device may comprise: one or more memories storing instructions;one or more transceivers; and one or more processors connected to theone or more memories and the one or more transceivers. For example, theone or more processors may execute the instructions to: perform sidelink(SL) communication with a first device within an active time, whereinthe active time may start at a first time point at which a first timerrelated to an on-duration time of an SL discontinuous reception (DRX)configuration or a second timer of the SL DRX configuration, and whereinthe active time may end at a second time point after a time offset valuefrom a time point at which the second timer expires.

For example, the performed SL communication may comprise: receiving,from the first device, sidelink control information (SCI) includinginformation related to partial sensing; performing the partial sensingbased on SL data of a priority value smaller than a threshold; selectingan SL resource within the partial sensing region; and performing atleast one of an initial transmission or a retransmission for the SLdata, based on the SL resource.

Various embodiments of the present disclosure may be combined with eachother.

Hereinafter, device(s) to which various embodiments of the presentdisclosure can be applied will be described.

The various descriptions, functions, procedures, proposals, methods,and/or operational flowcharts of the present disclosure described inthis document may be applied to, without being limited to, a variety offields requiring wireless communication/connection (e.g., betweendevices.

Hereinafter, a description will be given in more detail with referenceto the drawings. In the following drawings/description, the samereference symbols may denote the same or corresponding hardware blocks,software blocks, or functional blocks unless described otherwise.

FIG. 14 shows a communication system 1, based on an embodiment of thepresent disclosure. The embodiment of FIG. 14 may be combined withvarious embodiments of the present disclosure.

Referring to FIG. 14 , a communication system 1 to which variousembodiments of the present disclosure are applied includes wirelessdevices, Base Stations (BSs), and a network. Herein, the wirelessdevices represent devices performing communication using Radio AccessTechnology (RAT) (e.g., 5G New RAT (NR)) or Long-Term Evolution (LTE))and may be referred to as communication/radio/5G devices. The wirelessdevices may include, without being limited to, a robot 100 a, vehicles100 b-1 and 100 b-2, an eXtended Reality (XR) device 100 c, a hand-helddevice 100 d, a home appliance 100 e, an Internet of Things (IoT) device100 f, and an Artificial Intelligence (AI) device/server 400. Forexample, the vehicles may include a vehicle having a wirelesscommunication function, an autonomous vehicle, and a vehicle capable ofperforming communication between vehicles. Herein, the vehicles mayinclude an Unmanned Aerial Vehicle (UAV) (e.g., a drone). The XR devicemay include an Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality(MR) device and may be implemented in the form of a Head-Mounted Device(HMD), a Head-Up Display (HUD) mounted in a vehicle, a television, asmartphone, a computer, a wearable device, a home appliance device, adigital signage, a vehicle, a robot, etc. The hand-held device mayinclude a smartphone, a smartpad, a wearable device (e.g., a smartwatchor a smartglasses), and a computer (e.g., a notebook). The homeappliance may include a TV, a refrigerator, and a washing machine. TheIoT device may include a sensor and a smartmeter. For example, the BSsand the network may be implemented as wireless devices and a specificwireless device 200 a may operate as a BS/network node with respect toother wireless devices.

Here, wireless communication technology implemented in wireless devices100 a to 100 f of the present disclosure may include Narrowband Internetof Things for low-power communication in addition to LTE, NR, and 6G. Inthis case, for example, NB-IoT technology may be an example of Low PowerWide Area Network (LPWAN) technology and may be implemented as standardssuch as LTE Cat NB1, and/or LTE Cat NB2, and is not limited to the namedescribed above. Additionally or alternatively, the wirelesscommunication technology implemented in the wireless devices 100 a to100 f of the present disclosure may perform communication based on LTE-Mtechnology. In this case, as an example, the LTE-M technology may be anexample of the LPWAN and may be called by various names includingenhanced Machine Type Communication (eMTC), and the like. For example,the LTE-M technology may be implemented as at least any one of variousstandards such as 1) LTE CAT 2) LTE Cat M1, 3) LTE Cat M2, 4) LTEnon-Bandwidth Limited (non-BL), 5) LTE-MTC, 6) LTE Machine TypeCommunication, and/or 7) LTE M, and is not limited to the name describedabove. Additionally or alternatively, the wireless communicationtechnology implemented in the wireless devices 100 a to 100 f of thepresent disclosure may include at least one of Bluetooth, Low Power WideArea Network (LPWAN), and ZigBee considering the low-powercommunication, and is not limited to the name described above. As anexample, the ZigBee technology may generate personal area networks (PAN)related to small/low-power digital communication based on variousstandards including IEEE 802.15.4, and the like, and may be called byvarious names.

The wireless devices 100 a to 100 f may be connected to the network 300via the BSs 200. An AI technology may be applied to the wireless devices100 a to 100 f and the wireless devices 100 a to 100 f may be connectedto the AI server 400 via the network 300. The network 300 may beconfigured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g.,NR) network. Although the wireless devices 100 a to 100 f maycommunicate with each other through the BSs 200/network 300, thewireless devices 100 a to 100 f may perform direct communication (e.g.,sidelink communication) with each other without passing through the BSs/network. For example, the vehicles 100 b-1 and 100 b-2 may performdirect communication (e.g. Vehicle-to-Vehicle(V2V)/Vehicle-to-everything (V2X) communication). The IoT device (e.g.,a sensor) may perform direct communication with other IoT devices (e.g.,sensors) or other wireless devices 100 a to 100 f.

Wireless communication/connections 150 a, 150 b, or 150 c may beestablished between the wireless devices 100 a to 100 f/BS 200, or BS200/BS 200. Herein, the wireless communication/connections may beestablished through various RATs (e.g., 5G NR) such as uplink/downlinkcommunication 150 a, sidelink communication 150 b (or, D2Dcommunication), or inter BS communication (e.g. relay, Integrated AccessBackhaul (IAB)). The wireless devices and the BSs/the wireless devicesmay transmit/receive radio signals to/from each other through thewireless communication/connections 150 a and 150 b. For example, thewireless communication/connections 150 a and 150 b may transmit/receivesignals through various physical channels. To this end, at least a partof various configuration information configuring processes, varioussignal processing processes (e.g., channel encoding/decoding,modulation/demodulation, and resource mapping/demapping), and resourceallocating processes, for transmitting/receiving radio signals, may beperformed based on the various proposals of the present disclosure.

FIG. 15 shows wireless devices, based on an embodiment of the presentdisclosure. The embodiment of FIG. 15 may be combined with variousembodiments of the present disclosure.

Referring to FIG. 15 , a first wireless device 100 and a second wirelessdevice 200 may transmit radio signals through a variety of RATs (e.g.,LTE and NR). Herein, {the first wireless device 100 and the secondwireless device 200} may correspond to {the wireless device 100 x andthe BS 200} and/or {the wireless device 100 x and the wireless device100 x} of FIG. 14 .

The first wireless device 100 may include one or more processors 102 andone or more memories 104 and additionally further include one or moretransceivers 106 and/or one or more antennas 108. The processor(s) 102may control the memory(s) 104 and/or the transceiver(s) 106 and may beconfigured to implement the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument. For example, the processor(s) 102 may process informationwithin the memory(s) 104 to generate first information/signals and thentransmit radio signals including the first information/signals throughthe transceiver(s) 106. The processor(s) 102 may receive radio signalsincluding second information/signals through the transceiver 106 andthen store information obtained by processing the secondinformation/signals in the memory(s) 104. The memory(s) 104 may beconnected to the processor(s) 102 and may store a variety of informationrelated to operations of the processor(s) 102. For example, thememory(s) 104 may store software code including commands for performinga part or the entirety of processes controlled by the processor(s) 102or for performing the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.Herein, the processor(s) 102 and the memory(s) 104 may be a part of acommunication modem/circuit/chip designed to implement RAT (e.g., LTE orNR). The transceiver(s) 106 may be connected to the processor(s) 102 andtransmit and/or receive radio signals through one or more antennas 108.Each of the transceiver(s) 106 may include a transmitter and/or areceiver. The transceiver(s) 106 may be interchangeably used with RadioFrequency (RF) unit(s). In the present disclosure, the wireless devicemay represent a communication modem/circuit/chip.

The second wireless device 200 may include one or more processors 202and one or more memories 204 and additionally further include one ormore transceivers 206 and/or one or more antennas 208. The processor(s)202 may control the memory(s) 204 and/or the transceiver(s) 206 and maybe configured to implement the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument. For example, the processor(s) 202 may process informationwithin the memory(s) 204 to generate third information/signals and thentransmit radio signals including the third information/signals throughthe transceiver(s) 206. The processor(s) 202 may receive radio signalsincluding fourth information/signals through the transceiver(s) 106 andthen store information obtained by processing the fourthinformation/signals in the memory(s) 204. The memory(s) 204 may beconnected to the processor(s) 202 and may store a variety of informationrelated to operations of the processor(s) 202. For example, thememory(s) 204 may store software code including commands for performinga part or the entirety of processes controlled by the processor(s) 202or for performing the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.Herein, the processor(s) 202 and the memory(s) 204 may be a part of acommunication modem/circuit/chip designed to implement RAT (e.g., LTE orNR). The transceiver(s) 206 may be connected to the processor(s) 202 andtransmit and/or receive radio signals through one or more antennas 208.Each of the transceiver(s) 206 may include a transmitter and/or areceiver. The transceiver(s) 206 may be interchangeably used with RFunit(s). In the present disclosure, the wireless device may represent acommunication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 willbe described more specifically. One or more protocol layers may beimplemented by, without being limited to, one or more processors 102 and202. For example, the one or more processors 102 and 202 may implementone or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP,RRC, and SDAP). The one or more processors 102 and 202 may generate oneor more Protocol Data Units (PDUs) and/or one or more Service Data Unit(SDUs) according to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document. Theone or more processors 102 and 202 may generate messages, controlinformation, data, or information according to the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document. The one or more processors 102 and 202 maygenerate signals (e.g., baseband signals) including PDUs, SDUs,messages, control information, data, or information according to thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document and provide thegenerated signals to the one or more transceivers 106 and 206. The oneor more processors 102 and 202 may receive the signals (e.g., basebandsignals) from the one or more transceivers 106 and 206 and acquire thePDUs, SDUs, messages, control information, data, or informationaccording to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.

The one or more processors 102 and 202 may be referred to ascontrollers, microcontrollers, microprocessors, or microcomputers. Theone or more processors 102 and 202 may be implemented by hardware,firmware, software, or a combination thereof. As an example, one or moreApplication Specific Integrated Circuits (ASICs), one or more DigitalSignal Processors (DSPs), one or more Digital Signal Processing Devices(DSPDs), one or more Programmable Logic Devices (PLDs), or one or moreField Programmable Gate Arrays (FPGAs) may be included in the one ormore processors 102 and 202. The descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument may be implemented using firmware or software and the firmwareor software may be configured to include the modules, procedures, orfunctions. Firmware or software configured to perform the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document may be included in the one or more processors102 and 202 or stored in the one or more memories 104 and 204 so as tobe driven by the one or more processors 102 and 202. The descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document may be implemented using firmware or softwarein the form of code, commands, and/or a set of commands.

The one or more memories 104 and 204 may be connected to the one or moreprocessors 102 and 202 and store various types of data, signals,messages, information, programs, code, instructions, and/or commands.The one or more memories 104 and 204 may be configured by Read-OnlyMemories (ROMs), Random Access Memories (RAMs), Electrically ErasableProgrammable Read-Only Memories (EPROMs), flash memories, hard drives,registers, cash memories, computer-readable storage media, and/orcombinations thereof. The one or more memories 104 and 204 may belocated at the interior and/or exterior of the one or more processors102 and 202. The one or more memories 104 and 204 may be connected tothe one or more processors 102 and 202 through various technologies suchas wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, controlinformation, and/or radio signals/channels, mentioned in the methodsand/or operational flowcharts of this document, to one or more otherdevices. The one or more transceivers 106 and 206 may receive user data,control information, and/or radio signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document, from one or moreother devices. For example, the one or more transceivers 106 and 206 maybe connected to the one or more processors 102 and 202 and transmit andreceive radio signals. For example, the one or more processors 102 and202 may perform control so that the one or more transceivers 106 and 206may transmit user data, control information, or radio signals to one ormore other devices. The one or more processors 102 and 202 may performcontrol so that the one or more transceivers 106 and 206 may receiveuser data, control information, or radio signals from one or more otherdevices. The one or more transceivers 106 and 206 may be connected tothe one or more antennas 108 and 208 and the one or more transceivers106 and 206 may be configured to transmit and receive user data, controlinformation, and/or radio signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document, through the one ormore antennas 108 and 208. In this document, the one or more antennasmay be a plurality of physical antennas or a plurality of logicalantennas (e.g., antenna ports). The one or more transceivers 106 and 206may convert received radio signals/channels etc. from RF band signalsinto baseband signals in order to process received user data, controlinformation, radio signals/channels, etc. using the one or moreprocessors 102 and 202. The one or more transceivers 106 and 206 mayconvert the user data, control information, radio signals/channels, etc.processed using the one or more processors 102 and 202 from the baseband signals into the RF band signals. To this end, the one or moretransceivers 106 and 206 may include (analog) oscillators and/orfilters.

FIG. 16 shows a signal process circuit for a transmission signal, basedon an embodiment of the present disclosure. The embodiment of FIG. 16may be combined with various embodiments of the present disclosure.

Referring to FIG. 16 , a signal processing circuit 1000 may includescramblers 1010, modulators 1020, a layer mapper 1030, a precoder 1040,resource mappers 1050, and signal generators 1060. An operation/functionof FIG. 16 may be performed, without being limited to, the processors102 and 202 and/or the transceivers 106 and 206 of FIG. 15 . Hardwareelements of FIG. 16 may be implemented by the processors 102 and 202and/or the transceivers 106 and 206 of FIG. 15 . For example, blocks1010 to 1060 may be implemented by the processors 102 and 202 of FIG. 15. Alternatively, the blocks 1010 to 1050 may be implemented by theprocessors 102 and 202 of FIG. 15 and the block 1060 may be implementedby the transceivers 106 and 206 of FIG. 15 .

Codewords may be converted into radio signals via the signal processingcircuit 1000 of FIG. 16 . Herein, the codewords are encoded bitsequences of information blocks. The information blocks may includetransport blocks (e.g., a UL-SCH transport block, a DL-SCH transportblock). The radio signals may be transmitted through various physicalchannels (e.g., a PUSCH and a PDSCH).

Specifically, the codewords may be converted into scrambled bitsequences by the scramblers 1010. Scramble sequences used for scramblingmay be generated based on an initialization value, and theinitialization value may include ID information of a wireless device.The scrambled bit sequences may be modulated to modulation symbolsequences by the modulators 1020. A modulation scheme may includepi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying(m-PSK), and m-Quadrature Amplitude Modulation (m-QAM). Complexmodulation symbol sequences may be mapped to one or more transportlayers by the layer mapper 1030. Modulation symbols of each transportlayer may be mapped (precoded) to corresponding antenna port(s) by theprecoder 1040. Outputs z of the precoder 1040 may be obtained bymultiplying outputs y of the layer mapper 1030 by an N*M precodingmatrix W. Herein, N is the number of antenna ports and M is the numberof transport layers. The precoder 1040 may perform precoding afterperforming transform precoding (e.g., DFT) for complex modulationsymbols. Alternatively, the precoder 1040 may perform precoding withoutperforming transform precoding.

The resource mappers 1050 may map modulation symbols of each antennaport to time-frequency resources. The time-frequency resources mayinclude a plurality of symbols (e.g., a CP-OFDMA symbols and DFT-s-OFDMAsymbols) in the time domain and a plurality of subcarriers in thefrequency domain. The signal generators 1060 may generate radio signalsfrom the mapped modulation symbols and the generated radio signals maybe transmitted to other devices through each antenna. For this purpose,the signal generators 1060 may include Inverse Fast Fourier Transform(IFFT) modules, Cyclic Prefix (CP) inserters, Digital-to-AnalogConverters (DACs), and frequency up-converters.

Signal processing procedures for a signal received in the wirelessdevice may be configured in a reverse manner of the signal processingprocedures 1010 to 1060 of FIG. 16 . For example, the wireless devices(e.g., 100 and 200 of FIG. 15 ) may receive radio signals from theexterior through the antenna ports/transceivers. The received radiosignals may be converted into baseband signals through signal restorers.To this end, the signal restorers may include frequency downlinkconverters, Analog-to-Digital Converters (ADCs), CP remover, and FastFourier Transform (FFT) modules. Next, the baseband signals may berestored to codewords through a resource demapping procedure, apostcoding procedure, a demodulation processor, and a descramblingprocedure. The codewords may be restored to original information blocksthrough decoding. Therefore, a signal processing circuit (notillustrated) for a reception signal may include signal restorers,resource demappers, a postcoder, demodulators, descramblers, anddecoders.

FIG. 17 shows another example of a wireless device, based on anembodiment of the present disclosure. The wireless device may beimplemented in various forms according to a use-case/service (refer toFIG. 14 ). The embodiment of FIG. 17 may be combined with variousembodiments of the present disclosure.

Referring to FIG. 17 , wireless devices 100 and 200 may correspond tothe wireless devices 100 and 200 of FIG. 15 and may be configured byvarious elements, components, units/portions, and/or modules. Forexample, each of the wireless devices 100 and 200 may include acommunication unit 110, a control unit 120, a memory unit 130, andadditional components 140. The communication unit may include acommunication circuit 112 and transceiver(s) 114. For example, thecommunication circuit 112 may include the one or more processors 102 and202 and/or the one or more memories 104 and 204 of FIG. 15 . Forexample, the transceiver(s) 114 may include the one or more transceivers106 and 206 and/or the one or more antennas 108 and 208 of FIG. 15 . Thecontrol unit 120 is electrically connected to the communication unit110, the memory 130, and the additional components 140 and controlsoverall operation of the wireless devices. For example, the control unit120 may control an electric/mechanical operation of the wireless devicebased on programs/code/commands/information stored in the memory unit130. The control unit 120 may transmit the information stored in thememory unit 130 to the exterior (e.g., other communication devices) viathe communication unit 110 through a wireless/wired interface or store,in the memory unit 130, information received through the wireless/wiredinterface from the exterior (e.g., other communication devices) via thecommunication unit 110.

The additional components 140 may be variously configured according totypes of wireless devices. For example, the additional components 140may include at least one of a power unit/battery, input/output (I/O)unit, a driving unit, and a computing unit. The wireless device may beimplemented in the form of, without being limited to, the robot (100 aof FIG. 14 ), the vehicles (100 b-1 and 100 b-2 of FIG. 14 ), the XRdevice (100 c of FIG. 14 ), the hand-held device (100 d of FIG. 14 ),the home appliance (100 e of FIG. 14 ), the IoT device (100 f of FIG. 14), a digital broadcast terminal, a hologram device, a public safetydevice, an MTC device, a medicine device, a fintech device (or a financedevice), a security device, a climate/environment device, the AIserver/device (400 of FIG. 14 ), the BSs (200 of FIG. 14 ), a networknode, etc. The wireless device may be used in a mobile or fixed placeaccording to a use-example/service.

In FIG. 17 , the entirety of the various elements, components,units/portions, and/or modules in the wireless devices 100 and 200 maybe connected to each other through a wired interface or at least a partthereof may be wirelessly connected through the communication unit 110.For example, in each of the wireless devices 100 and 200, the controlunit 120 and the communication unit 110 may be connected by wire and thecontrol unit 120 and first units (e.g., 130 and 140) may be wirelesslyconnected through the communication unit 110. Each element, component,unit/portion, and/or module within the wireless devices 100 and 200 mayfurther include one or more elements. For example, the control unit 120may be configured by a set of one or more processors. As an example, thecontrol unit 120 may be configured by a set of a communication controlprocessor, an application processor, an Electronic Control Unit (ECU), agraphical processing unit, and a memory control processor. As anotherexample, the memory 130 may be configured by a Random Access Memory(RAM), a Dynamic RAM (DRAM), a Read Only Memory (ROM)), a flash memory,a volatile memory, a non-volatile memory, and/or a combination thereof.

Hereinafter, an example of implementing FIG. 17 will be described indetail with reference to the drawings.

FIG. 18 shows a hand-held device, based on an embodiment of the presentdisclosure.

The hand-held device may include a smartphone, a smartpad, a wearabledevice (e.g., a smartwatch or a smartglasses), or a portable computer(e.g., a notebook). The hand-held device may be referred to as a mobilestation (MS), a user terminal (UT), a Mobile Subscriber Station (MSS), aSubscriber Station (SS), an Advanced Mobile Station (AMS), or a WirelessTerminal (WT). The embodiment of FIG. 18 may be combined with variousembodiments of the present disclosure.

Referring to FIG. 18 , a hand-held device 100 may include an antennaunit 108, a communication unit 110, a control unit 120, a memory unit130, a power supply unit 140 a, an interface unit 140 b, and an I/O unit140 c. The antenna unit 108 may be configured as a part of thecommunication unit 110. Blocks 110 to 130/140 a to 140 c correspond tothe blocks 110 to 130/140 of FIG. 17 , respectively.

The communication unit 110 may transmit and receive signals (e.g., dataand control signals) to and from other wireless devices or BSs. Thecontrol unit 120 may perform various operations by controllingconstituent elements of the hand-held device 100. The control unit 120may include an Application Processor (AP). The memory unit 130 may storedata/parameters/programs/code/commands needed to drive the hand-helddevice 100. The memory unit 130 may store input/output data/information.The power supply unit 140 a may supply power to the hand-held device 100and include a wired/wireless charging circuit, a battery, etc. Theinterface unit 140 b may support connection of the hand-held device 100to other external devices. The interface unit 140 b may include variousports (e.g., an audio I/O port and a video I/O port) for connection withexternal devices. The I/O unit 140 c may input or output videoinformation/signals, audio information/signals, data, and/or informationinput by a user. The I/O unit 140 c may include a camera, a microphone,a user input unit, a display unit 140 d, a speaker, and/or a hapticmodule.

As an example, in the case of data communication, the I/O unit 140 c mayacquire information/signals (e.g., touch, text, voice, images, or video)input by a user and the acquired information/signals may be stored inthe memory unit 130. The communication unit 110 may convert theinformation/signals stored in the memory into radio signals and transmitthe converted radio signals to other wireless devices directly or to aBS. The communication unit 110 may receive radio signals from otherwireless devices or the BS and then restore the received radio signalsinto original information/signals. The restored information/signals maybe stored in the memory unit 130 and may be output as various types(e.g., text, voice, images, video, or haptic) through the I/O unit 140c.

FIG. 19 shows a vehicle or an autonomous vehicle, based on an embodimentof the present disclosure. The vehicle or autonomous vehicle may beimplemented by a mobile robot, a car, a train, a manned/unmanned AerialVehicle (AV), a ship, etc. The embodiment of FIG. 19 may be combinedwith various embodiments of the present disclosure.

Referring to FIG. 19 , a vehicle or autonomous vehicle 100 may includean antenna unit 108, a communication unit 110, a control unit 120, adriving unit 140 a, a power supply unit 140 b, a sensor unit 140 c, andan autonomous driving unit 140 d. The antenna unit 108 may be configuredas a part of the communication unit 110. The blocks 110/130/140 a to 140d correspond to the blocks 110/130/140 of FIG. 17 , respectively.

The communication unit 110 may transmit and receive signals (e.g., dataand control signals) to and from external devices such as othervehicles, BSs (e.g., gNBs and road side units), and servers. The controlunit 120 may perform various operations by controlling elements of thevehicle or the autonomous vehicle 100. The control unit 120 may includean Electronic Control Unit (ECU). The driving unit 140 a may cause thevehicle or the autonomous vehicle 100 to drive on a road. The drivingunit 140 a may include an engine, a motor, a powertrain, a wheel, abrake, a steering device, etc. The power supply unit 140 b may supplypower to the vehicle or the autonomous vehicle 100 and include awired/wireless charging circuit, a battery, etc. The sensor unit 140 cmay acquire a vehicle state, ambient environment information, userinformation, etc. The sensor unit 140 c may include an InertialMeasurement Unit (IMU) sensor, a collision sensor, a wheel sensor, aspeed sensor, a slope sensor, a weight sensor, a heading sensor, aposition module, a vehicle forward/backward sensor, a battery sensor, afuel sensor, a tire sensor, a steering sensor, a temperature sensor, ahumidity sensor, an ultrasonic sensor, an illumination sensor, a pedalposition sensor, etc. The autonomous driving unit 140 d may implementtechnology for maintaining a lane on which a vehicle is driving,technology for automatically adjusting speed, such as adaptive cruisecontrol, technology for autonomously driving along a determined path,technology for driving by automatically setting a path if a destinationis set, and the like.

For example, the communication unit 110 may receive map data, trafficinformation data, etc. from an external server. The autonomous drivingunit 140 d may generate an autonomous driving path and a driving planfrom the obtained data. The control unit 120 may control the drivingunit 140 a such that the vehicle or the autonomous vehicle 100 may movealong the autonomous driving path according to the driving plan (e.g.,speed/direction control). In the middle of autonomous driving, thecommunication unit 110 may aperiodically/periodically acquire recenttraffic information data from the external server and acquiresurrounding traffic information data from neighboring vehicles. In themiddle of autonomous driving, the sensor unit 140 c may obtain a vehiclestate and/or surrounding environment information. The autonomous drivingunit 140 d may update the autonomous driving path and the driving planbased on the newly obtained data/information. The communication unit 110may transfer information about a vehicle position, the autonomousdriving path, and/or the driving plan to the external server. Theexternal server may predict traffic information data using AItechnology, etc., based on the information collected from vehicles orautonomous vehicles and provide the predicted traffic information datato the vehicles or the autonomous vehicles.

Claims in the present description can be combined in a various way. Forinstance, technical features in method claims of the present descriptioncan be combined to be implemented or performed in an apparatus, andtechnical features in apparatus claims can be combined to be implementedor performed in a method. Further, technical features in method claim(s)and apparatus claim(s) can be combined to be implemented or performed inan apparatus. Further, technical features in method claim(s) andapparatus claim(s) can be combined to be implemented or performed in amethod.

1. A method for performing, by a first device, wireless communicationbased on a sidelink (SL) discontinuous reception (DRX) configuration,the method comprising: starting a first timer related to an on-durationtime; starting a second timer; and performing SL communication within anactive time, wherein the active time starts at a first time point atwhich the first timer or the second timer is started, and wherein theactive time ends at a second time point after a time offset value from atime point at which the second timer expires.
 2. The method of claim 1,further comprising: receiving, from a second device, information relatedto an SL resource, including a priority value; and determining whetherto perform resource reselection based on a threshold related topre-emption and the priority value, wherein the SL communicationcomprises selecting the SL resource within the active time.
 3. Themethod of claim 2, further comprising: performing the resourcereselection, based on the priority value being smaller than thethreshold.
 4. The method of claim 2, wherein the threshold is a firstthreshold, based on the first device performing an SL DRX operation, andwherein the threshold is a second threshold different from the firstthreshold, based on the first device not performing an SL DRX operation.5. The method of claim 4, wherein the threshold is the first threshold,based on the SL communication being performed within the on-durationtime, and wherein the first threshold is smaller than the secondthreshold.
 6. The method of claim 2, wherein the priority value is afirst value, based on the priority value being related to a wakeupindication signal (WIS), wherein the priority value is a second value,based on the priority value being related to a radio resource control(RRC) signaling, wherein the priority value is a third value, based onthe priority value being related to data related to an SL service, andwherein the first value smaller than the third value is greater than thesecond value.
 7. The method of claim 2, wherein the priority value is afirst value, based on the priority value being related to relaycommunication, and wherein the priority value is a second value greaterthan the first value, based on the priority value being not related torelay communication.
 8. The method of claim 2, wherein the priorityvalue is a logical channel priority or layer (L)-1 priority, based onthe priority value being related to a WIS.
 9. The method of claim 1,further comprising: receiving, from a base station, the time offsetvalue through at least one of an RRC message, a medium access control(MAC) control element (CE) or downlink control information (DCI). 10.The method of claim 1, wherein resource reselection is not performed,based on the first device performing an SL DRX operation.
 11. The methodof claim 1, wherein the performed SL communication comprises:determining a sensing window; performing sensing within the sensingwindow; selecting a first SL resource within a first selection window,based on a result of the sensing, wherein the first selection window isincluded within the active time; reselecting a second SL resource withina second selection window within packet delay budget (PDB) of SL data,based on collision of the first SL resource and the first selectionwindow not including any available resource, wherein the secondselection window is not included within the active time; andtransmitting, to a second device, the SL data based on the second SLresource.
 12. The method of claim 1, further comprising: receiving, froma second device, information related to an SL resource, including apriority value; and determining whether to perform resource reselectionbased on a threshold related to pre-emption and the priority value,based on the SL resource within the active time is not included withinthe on-duration time, wherein the SL communication comprises: selectingthe SL resource within the active time, and wherein the resourcereselection is not performed, based on the SL resource being includedwithin the on-duration time.
 13. The method of claim 1, furthercomprising: transmitting, to a second device, sidelink controlinformation (SCI) including information related to partial sensing,wherein at least one of an initial transmission or a retransmission forSL data of a priority value smaller than a threshold is transmitted fromthe second device through an SL resource within the partial sensingregion, based on the information related to the partial sensing.
 14. Afirst device for performing wireless communication, the first devicecomprising: one or more memories storing instructions; one or moretransceivers; and one or more processors connected to the one or morememories and the one or more transceivers, wherein the one or moreprocessors execute the instructions to: start a first timer related toan on-duration time; start a second timer; and perform SL communicationwithin an active time, wherein the active time starts at a first timepoint at which the first timer or the second timer is started, andwherein the active time ends at a second time point after a time offsetvalue from a time point at which the second timer expires.
 15. A deviceadapted to control a first user equipment (UE) the device comprising:one or more processors; and one or more memories operably connectable tothe one or more processors and storing instructions, wherein the one ormore processors execute the instructions to: start a first timer relatedto an on-duration time; start a second timer; and perform SLcommunication within an active time, wherein the active time starts at afirst time point at which the first timer or the second timer isstarted, and wherein the active time ends at a second time point after atime offset value from a time point at which the second timer expires.16-20. (canceled)